Also I don't think persona are selectable. Characters use their ones from the story it seems.

From this screen it looks like the glasses and personas may be selectable though.

Unfortunately, that screenshot isn't really conclusive. It's a character customization screen (from the text on the bottom) where it looks like you can customize various aspects of your character (glasses, character color, and persona). HOPEFULLY the persona option lets you change the characters persona, but it's kinda looking like it won't let you. It might just be a screen that lets you pick the color of your persona =\

Unfortunately, that screenshot isn't really conclusive. It's a character customization screen (from the text on the bottom) where it looks like you can customize various aspects of your character (glasses, character color, and persona). HOPEFULLY the persona option lets you change the characters persona, but it's kinda looking like it won't let you. It might just be a screen that lets you pick the color of your persona =\

It would be awesome if they let you select persona from a very limited list. But honestly animating many persona is impossible. Arc sys speciallizes in 2D HD sprites and it takes much more time to create a character than 3D fighting games.